Imported Upstream version 5.18.0.205

Former-commit-id: 7f59f7e792705db773f1caecdaa823092f4e2927

external/llvm/utils/fpcmp/fpcmp.cpp

@@ -0,0 +1,42 @@
+//===- fpcmp.cpp - A fuzzy "cmp" that permits floating point noise --------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// fpcmp is a tool that basically works like the 'cmp' tool, except that it can
+// tolerate errors due to floating point noise, with the -r and -a options.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/FileUtilities.h"
+#include "llvm/Support/raw_ostream.h"
+using namespace llvm;
+
+namespace {
+  cl::opt<std::string>
+  File1(cl::Positional, cl::desc("<input file #1>"), cl::Required);
+  cl::opt<std::string>
+  File2(cl::Positional, cl::desc("<input file #2>"), cl::Required);
+
+  cl::opt<double>
+  RelTolerance("r", cl::desc("Relative error tolerated"), cl::init(0));
+  cl::opt<double>
+  AbsTolerance("a", cl::desc("Absolute error tolerated"), cl::init(0));
+}
+
+int main(int argc, char **argv) {
+  cl::ParseCommandLineOptions(argc, argv);
+
+  std::string ErrorMsg;
+  int DF = DiffFilesWithTolerance(File1, File2, AbsTolerance, RelTolerance,
+                                  &ErrorMsg);
+  if (!ErrorMsg.empty())
+    errs() << argv[0] << ": " << ErrorMsg << "\n";
+  return DF;
+}
+